Update: GameMaker Studio Standard is now 100% free permanently, more info here.
As the title says, GameMaker Studio: Standard Edition (worth $49.99) is currently being offered for free. And after upgrading to your free Standard Edition, you can get the Tizen Export Module for free as well. Additionally, you can use the free Standard edition license to upgrade to the Professional edition for only $35 more ($64.99 off). This offer ends March 2, 2014.
For those who do not know, GameMaker: Studio is a game creation system that caters to entry-level novices and seasoned game development professionals equally, allowing them to create cross-platform games in record time and at a fraction of the cost! As well as making games development 80 percent faster than coding for native languages, developers can create fully functional prototypes in just a few hours, and a full game in just a matter of weeks.
Upgrade to Game Maker Studio Standard For Free:
To take advantage of this offer, download GameMaker Studio from this link, not via steam. The promo will not be coming to steam and promo users will not get a standard steam key. Install and follow the instructions that appear.
Note: Due to high demand, the license key may take a while to appear in your email inbox, and there may be delays when trying to validate the key.
After upgrading to your free Standard Edition, you can get the Tizen export module for free as well: sign up for the Tizen module for free (Please note that if you already have GameMaker: Studio Professional or GameMaker: Studio Master Collection then you will already have the Tizen Module and need not apply).
As an added bonus, you can take your free Standard Edition license key, and use it to upgrade to Professional Edition for only $35 instead of $99.99.
Enter your Standard Edition license key in the Upgrades and Discounts field when checking out.
Updated: The old promo (shared on Nov 25, 2013) has expired but GameMaker Studio are rerunning this giveaway once again so everybody will get another chance to keep this professional game creation system for free.